Locking device for front-plate stripping-doors of carding-engines.



No. 884,405. PATENTED APR. 14, 1908.

'J. MY-ERSOOUGH & J. GORNALL.

LOOKING DEVICE FOR FRONT PLATE STRIPPING DOORS OF OARDING ENGINES.

APPLICATION FILED AUG. 10. 1907.

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PATENTED APR. 14 1908. ALL.

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J. MYERSOOUGH & Jr GORN V .LOGKING DEVICE FOR FRONT'PLATB STRIPPING DOORS 0 APPLICATION FILED AUG .10, 1907- No. 884,405. PATENTED M1114, 190s.

. J. MYERSGOUGH & LGORNALL. LOCKING DEVICE FOR FRONT PLATE STRIPPING DOORSOF GARDING ENGINES.

APPLICATION FILED AUG. 10, 1907.

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UNITED STATES PATENT OFFICE.

JAMES MYERSOOUGH AND JAMES GORNALL, OF PRESTON, ENGLAND, ASSIGNORS TO DOBSOM AND BARLOW LIMITED, OF BOLTON, ENGLAND.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed August 10, 1907. Serial No. 388,045.

To all whom it may concern:

Be it known that we, J AMES MYERsooUcH and JAMES GORNALL, both being subjects of Great Britain, the former residing at 18 Edward street, Walton-le-Dale, Preston, in the county of Lancaster, En land, and the latter being a resident of 42 arstang road, Fulwood, Preston aforesaid, have invented new and useful Improvements in or Relating to Locking Devices for Front-Plate Strippin Doors of Carding-Engines, of which the fol lowing is a specification.

Our invention consists of improvements in or relatingto locking devices for front plate stripping doors for cotton carding engines and has for its objects (1) to provide a simple and reliable means for automatically locking the front stripping plate or cylinder door of carding engines; and (2) to provide means to prevent said engines from being set in motion unless and until the said cylinder door has previously been closed.

Our invention, therefore, constitutes a complete safeguard against accidents or danger to the operatives of the machine by preventing ingress to the internal revolving carding cylinder while the same is in motion and making it incumbent uponthem to close said door before the engine can be started.

In the accompanying three sheets of drawings--Figure 1 1s a side elevation and Fig. 2 x

is a plan of part of a carding engine to which our improvements are applied. Figs. 3 and 4 are similar views to Figs. 1 and 2 respectively but showing the stripping door opened and the connected parts in their corresponding relative positions.

11 these views,a designates the main cylinder casing and side framing; b the doffer casing; c the main cylinder shaft; (1 the driving ulley fast on the main cylinder shaft; e the oose pulley; g the strap fork; h the stud on which the strap fork is pivoted; i the stripping door; j one of the two arms, pivoted to the doffer casing b, which carry the strip ing door; 10 7c are the usual bearing brac ets for the stripping and grinding rollers.

In carrying our improvements into effect we bolt a bracket on the side framing a or it might be on the pedestal of the main cylinder shaft 0, the first position being indicated by dashes and the second position by dotted lines in Figs. 1 and 3. To this bracket we bolt an arm or extension bracket 2 and to in the bar 6.

this arm 2 we pivot at 3 a lever 4 having a right angled extension or stop foot at one end and connected at the other end by a rod 5 to one of the arms of the stripping door 01.

To the arm 2 we connect a sliding plate or fiat bar 6 by screws 7 passing through slots 8 A diagonal slot 9 is formed in front of the slide 'bar 6 and a pin 10 passes through this slot and into one end of a lever 11 fulcrumed at 12 to the grinding roller bracket 7c. At the other end of the lever 11 is mounted a ivoted catch or looking bolt 13 which holds t e stripping door i in the position shown in Figs. 1 and 2. On the other end of the slide bar 6 and at right angles thereto we fix a finger or stud 14 and on the inside of the driving pulley d we form or fix any suitable number of inclined projections or cams 15.

When the parts are in the relative positions shown in Figs. 1 and 2 the stripping door 11 is closed and cannot be opened until the driving belt has been moved by the strap fork gfrom the driving pulley d to the loose pulley e and until the main cylinder has come to a dead stop with the finger or stud 14 on the slide bar 6 clear of the inclined projections or cams 15 on the interior of the driving pulley d. When in this position and with the main cylinder stationary the stripping door it can be opened by pulling it back into' the position shown in Flgs. 3 and 4 because the slide bar 6 is at this time free from the action of the inclined projections or cams 15 and therefore allows the pivoted catch 13 to move back with the lever 11 and the pin 10 to draw back the slide bar 6 as it travels along the inclined slot 9 and simultaneously as the arm j moves back with the stripping door *5 the connecting rod 5 actuates the lever 4 and brings its right angled extension or stop foot in the path of the strap fork g and so blocks the movement of thelatter and prevents the belt being moved on to the driving pulley (1 until the stripping door i has been again closed and the parts have returned to the relative positions shown in Figs. 1 and 2. So long therefore as the driving pulley d is in motion it is impossible to withdraw the pivoted catch or locking bolt 13 and obtain access through the stripping door to the carding cylinder for any grinding or stripping operation even though the belt has been thrown off the driving pulley d of the carding cylinder which usually continues to revolve for some little while by the momentum imparted to it.

What we claim and desire to secure by Letters Patent of the United States is 1. In combination with a carding cylinder and its door, of operating means therefor, including the driving pulley and loose pulley, a belt shifter, a bar slidably supported, a finger 14 on said bar, cams on the driving pulley adapted to engage with said finger, a catch for the door carried by the bar, supporting arms carrying the door, a lever 4 having a foot thereon adapted to engage with the belt shifter to prevent movement thereof, and a connecting link between the su porting arms and said lever, substantia ly as described.

2. In combination with a carding cylinder and its door, operating means for said cylinder comprising the driving and loose pulleys, and a belt for driving the same, the

belt shifter, a bar slidably supported, a finger 14 on said bar, said bar having a diagonal slot, a lever having a pin working in said slot, a catch carried by said lever and adapted to engage with the door, cams on the driving pulley adapted to engage with the finger for holding the catch in engage ment with the door, supporting arms for the door, a lever 4, a link connecting said lever to the supporting arms, and a foot on the lever 4 for preventing movement of the belt shifter when the door is open, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JAMES MYERSCOUGH. JAMES GORNALL.

Witnesses:

HENRY BEBNOULLI BARLOW, HERBERT ROWLAND ABBEY. 

